/*! 
* WeX5 v3 (http://www.justep.com) 
* Copyright 2015 Justep, Inc.
* Licensed under Apache License, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0) 
*/ 

var MD5 = function(hexcase) {
	//this.hexcase = !hexcase?0:1; /* hex output format. 0 - lowercase; 1 - uppercase */
	//this.b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance */
	//this.chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode */
};


var hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
var b64pad = ""; /* base-64 pad character. "=" for strict RFC compliance */
var chrsz = 8; /* bits per input character. 8 - ASCII; 16 - Unicode */

/* 
 * These are the functions you'll usually want to call 
 * They take string arguments and return either hex or base-64 encoded strings 
 */
MD5.prototype.hex_md5 = function(s) {
	return this.binl2hex(this.core_md5(this.str2binl(s), s.length * chrsz));
};

MD5.prototype.hex_md5_salt = function(s){
	var md5ed = this.hex_md5(s);
	
	var items1 = [];
	var items2 = [];
	for (var i=0; i<md5ed.length; i++){
		if (i%2 === 0){
			items1.push(md5ed.charAt(i));
		}else{
			items2.push(md5ed.charAt(i));
		}
	}
	var result = ":" + items1.join("") + items2.join("");
	return result;
};

MD5.prototype.b64_md5 = function(s) {
	return this.binl2b64(this.core_md5(this.str2binl(s), s.length * chrsz));
};

MD5.prototype.hex_hmac_md5 = function(key, data) {
	return this.binl2hex(this.core_hmac_md5(key, data));
};

MD5.prototype.b64_hmac_md5 = function(key, data) {
	return this.binl2b64(this.core_hmac_md5(key, data));
};

/* Backwards compatibility - same as hex_md5() */
MD5.prototype.calcMD5 = function(s){
	return this.binl2hex(this.core_md5(this.str2binl(s), s.length * chrsz));
};

MD5.prototype.core_md5 = function(x, len) {
	/* append padding */
	x[len >> 5] |= 0x80 << ((len) % 32);
	x[(((len + 64) >>> 9) << 4) + 14] = len;
	
	var a = 1732584193;
	var b = -271733879;
	var c = -1732584194;
	var d = 271733878;
	
	for (var i = 0; i < x.length; i += 16) {
		var olda = a;
		var oldb = b;
		var oldc = c;
		var oldd = d;
		
		a = this.md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
		d = this.md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
		c = this.md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
		b = this.md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
		a = this.md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
		d = this.md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
		c = this.md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
		b = this.md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
		a = this.md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
		d = this.md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
		c = this.md5_ff(c, d, a, b, x[i + 10], 17, -42063);
		b = this.md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
		a = this.md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
		d = this.md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
		c = this.md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
		b = this.md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
		
		a = this.md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
		d = this.md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
		c = this.md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
		b = this.md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
		a = this.md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
		d = this.md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
		c = this.md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
		b = this.md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
		a = this.md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
		d = this.md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
		c = this.md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
		b = this.md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
		a = this.md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
		d = this.md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
		c = this.md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
		b = this.md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
		
		a = this.md5_hh(a, b, c, d, x[i + 5], 4, -378558);
		d = this.md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
		c = this.md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
		b = this.md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
		a = this.md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
		d = this.md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
		c = this.md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
		b = this.md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
		a = this.md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
		d = this.md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
		c = this.md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
		b = this.md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
		a = this.md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
		d = this.md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
		c = this.md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
		b = this.md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
		
		a = this.md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
		d = this.md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
		c = this.md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
		b = this.md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
		a = this.md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
		d = this.md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
		c = this.md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
		b = this.md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
		a = this.md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
		d = this.md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
		c = this.md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
		b = this.md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
		a = this.md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
		d = this.md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
		c = this.md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
		b = this.md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
		
		a = this.safe_add(a, olda);
		b = this.safe_add(b, oldb);
		c = this.safe_add(c, oldc);
		d = this.safe_add(d, oldd);
	}
	return Array(a, b, c, d);
	
};

/* 
 * These functions implement the four basic operations the algorithm uses. 
 */
MD5.prototype.md5_cmn = function(q, a, b, x, s, t) {
	return this.safe_add(this.bit_rol(this.safe_add(this.safe_add(a, q), this.safe_add(x, t)), s), b);
};
MD5.prototype.md5_ff = function(a, b, c, d, x, s, t) {
	return this.md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
};
MD5.prototype.md5_gg = function(a, b, c, d, x, s, t) {
	return this.md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
};
MD5.prototype.md5_hh = function (a, b, c, d, x, s, t) {
	return this.md5_cmn(b ^ c ^ d, a, b, x, s, t);
};
MD5.prototype.md5_ii = function (a, b, c, d, x, s, t) {
	return this.md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
};

/* 
 * Calculate the HMAC-MD5, of a key and some data 
 */
MD5.prototype.core_hmac_md5 = function (key, data) {
	var bkey = this.str2binl(key);
	if (bkey.length > 16)
		bkey = this.core_md5(bkey, key.length * chrsz);
	
	var ipad = Array(16), opad = Array(16);
	for (var i = 0; i < 16; i++) {
		ipad[i] = bkey[i] ^ 0x36363636;
		opad[i] = bkey[i] ^ 0x5C5C5C5C;
	}
	
	var hash = this.core_md5(ipad.concat(this.str2binl(data)), 512 + data.length * chrsz);
	return this.core_md5(opad.concat(hash), 512 + 128);
};

/* 
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally 
 * to work around bugs in some JS interpreters. 
 */
MD5.prototype.safe_add = function (x, y) {
	var lsw = (x & 0xFFFF) + (y & 0xFFFF);
	var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
	return (msw << 16) | (lsw & 0xFFFF);
};

/* 
 * Bitwise rotate a 32-bit number to the left. 
 */
MD5.prototype.bit_rol = function (num, cnt) {
	return (num << cnt) | (num >>> (32 - cnt));
};

/* 
 * Convert a string to an array of little-endian words 
 * If chrsz is ASCII, characters >255 have their hi-byte silently ignored. 
 */
MD5.prototype.str2binl = function (str) {
	var bin = Array();
	var mask = (1 << chrsz) - 1;
	for (var i = 0; i < str.length * chrsz; i += chrsz)
		bin[i >> 5] |= (str.charCodeAt(i / chrsz) & mask) << (i % 32);
	return bin;
};

/* 
 * Convert an array of little-endian words to a hex string. 
 */
MD5.prototype.binl2hex = function (binarray) {
	var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
	var str = "";
	for (var i = 0; i < binarray.length * 4; i++) {
		str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF)
		+ hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF);
	}
	return str;
};

/* 
 * Convert an array of little-endian words to a base-64 string 
 */
MD5.prototype.binl2b64 = function (binarray) {
	var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
	var str = "";
	for (var i = 0; i < binarray.length * 4; i += 3) {
		var triplet = (((binarray[i >> 2] >> 8 * (i % 4)) & 0xFF) << 16)
		| (((binarray[i + 1 >> 2] >> 8 * ((i + 1) % 4)) & 0xFF) << 8)
		| ((binarray[i + 2 >> 2] >> 8 * ((i + 2) % 4)) & 0xFF);
		for (var j = 0; j < 4; j++) {
			if (i * 8 + j * 6 > binarray.length * 32)
				str += b64pad;
			else
				str += tab.charAt((triplet >> 6 * (3 - j)) & 0x3F);
		}
	}
	return str;
};